Objectives: We used "hot spotting" to characterize the persons most frequently admitted to the New York City jail system in 2013.
Methods: We used our Correctional Health Services electronic health record to identify 800 patients admitted in 2013 who returned most since November 2008. We compared them to a randomly selected control group of 800 others admitted in 2013, by using descriptive statistics and cross-tabulations, including data through December 2014.
Results: The frequently incarcerated individuals had a median of 21 incarcerations (median duration 11 days), representing 18 713 admissions and $129 million in custody and health costs versus $38 million for the controls. The frequently incarcerated were significantly older (42 vs 35 years), and more likely to have serious mental illness (19% vs 8.5%) and homelessness (51.5% vs 14.7%) in their record. Significant substance use was highly prevalent (96.9% vs 55.6%). Most top criminal charges (88.7%) for the frequently incarcerated were misdemeanors; assault charges were less common (2.8% vs 10.4%).
Conclusions: Frequently incarcerated persons have chronic mental health and substance use problems, their charges are generally minor, and incarceration is costly. Tailored supportive housing is likely to be less costly and improve outcomes.